Large Magnetocaloric Effect in a Wells–Dawson Type {Ni6Gd6P6} Cage

Authors

  • Dr. Yan-Zhen Zheng,

    1. School of Chemistry and Photon Science Institute, The University of Manchester, Oxford Road. M13 9PL, Manchester (UK), Fax: (+44) 161-275-4616
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  • Dr. Marco Evangelisti,

    1. Instituto de Ciencia de Materiales de Aragón, CSIC—Universidad de Zaragoza, Departamento de Fisica de al Materia Condensada, 50009, Zaragoza (Spain)
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  • Prof. Dr. Richard E. P. Winpenny

    Corresponding author
    1. School of Chemistry and Photon Science Institute, The University of Manchester, Oxford Road. M13 9PL, Manchester (UK), Fax: (+44) 161-275-4616
    • School of Chemistry and Photon Science Institute, The University of Manchester, Oxford Road. M13 9PL, Manchester (UK), Fax: (+44) 161-275-4616
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  • Y.Z.Z. is grateful for the support of Marie Curie International Incoming Fellowship (EC contract no: PIIF-GA-2008-219588). M.E. acknowledges the MICINN for contracts MAT2009-13977-C03 and CSD2007-00010. R.E.P.W. is grateful to the Royal Society for a Wolfson Merit Award. We thank Prof. Eric McInnes for helpful discussions.

Abstract

original image

Cool stuff: The usage of phosphonates has led to formation of a family of 3d–4f heterometallic cages with a Wells–Dawson-like structure (see picture; Gd, Dy, or Y purple; Ni cyan; P green; O orange; C gray). Magnetic studies show ferromagnetic interactions within the oxo-centered nickel triangle and huge entropy change in the Gd analogue, which, in principle, can be used as an ultralow-temperature coolant.

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